Main article: Such files are saved using an extra X letter in their extension. However, it can still save documents in the old format, which is compatible with previous versions. Alternatively, Microsoft has made available a free add-on known as the Microsoft Office Compatibility Pack that lets Office , XP, and open, edit, and save documents created under the newer format. However, due to legal objections from Adobe Systems , Office originally did not offer PDF support out of the box, but rather as a separate free download. This is part of Service Pack 2 and prior to that, was available as a free plug-in in a separate download. OpenDocument software Microsoft backs an open-source effort to support OpenDocument in Office , as well as earlier versions up to Office , through a converter add-in for Word, Excel and PowerPoint, and also a command-line utility.
So let's say you're still weighing a move to Office but can't imagine paying full or even upgrade price when there free, worthy alternatives such as Google Docs, Lotus Symphony, OpenOffice. What to do if you don't want to wait until next year, when Microsoft launches Office 14 and will, as Microsoft confirmed last week, offer at least one version of Office 14 via the Web for free? Tight times, equal measures There are two established ways to buy Microsoft Office on the cheap. One is the reseller version.